# Problem: A solution contains 0.115 mol H2O and an unknown number of moles of sodium chloride. The vapor pressure of the solution at 30oC is 25.5 torr. The vapor pressure of pure water at 30oC is 31.5 torr. Calculate the number of moles of sodium chloride in the solution.

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###### Problem Details

A solution contains 0.115 mol H2O and an unknown number of moles of sodium chloride. The vapor pressure of the solution at 30oC is 25.5 torr. The vapor pressure of pure water at 30oC is 31.5 torr. Calculate the number of moles of sodium chloride in the solution.